[mucode-users] Mucode-1.03 and JDK-1.4.1_01

[Stefanos Z. <s.z...@cs...>]

Hello, 
I recently downloaded mucode 1.03 and am having trouble getting (some
of) the examples to work. This is on a intel Linux system, running
redhat 7.3 and Sun jdk 1.4.1_01. The behaviour is reproducable each
time, on examples Mobile Agent and CopyThread. The error is always the
same, java.lang.NoClassDefFoundError:
sun/reflect/SerializationConstructorAccessorImpl.

Searching google for this error produces the following links:
http://www.mail-archive.com/tom...@ja.../msg36875.html
http://groups.google.com/groups?q=java.lang.NoClassDefFoundError:+sun/reflect/SerializationConstructorAccessorImpl&hl=en&lr=&ie=UTF-8&oe=UTF-8&selm=dae481f5.0212110631.1be30da4%40posting.google.com&rnum=2

I'm running mucode with a clean classpath (only rt.jar,mucode.jar and .
are included). I can, however get the examples to run properly using
jdk-1.3.1_06. I have also tried using jdk-1.4.0 from blackdown, but to
no avail (same error occurs).

Please find attached the log from CopyThread.

Thanks from your time,
Stefanos



Log from Launcher:
szachari@mousakas:~/dload/mucode/examples/Provider$ export
CLASSPATH=/usr/java/j2sdk1.4.1_01/jre/lib/rt.jar:/home/szachari/dload/mucode/jar/mucode.jar:.
szachari@mousakas:~/dload/mucode/examples/Provider$ java
mucode.util.Launcher -port 2000
-- listing properties --
compression=false
debug=false
port=2000
ubiclasses=
messages=true
timeout=30000
ubipackages=java.* javax.* mucode.*
errors=true
mucode: MuServer activated on port 2000
java.lang.NoClassDefFoundError:
sun/reflect/SerializationConstructorAccessorImpl
	at sun.misc.Unsafe.defineClass(Native Method)
	at sun.reflect.ClassDefiner.defineClass(ClassDefiner.java:45)
	at
sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:381)
	at java.security.AccessController.doPrivileged(Native Method)
	at
sun.reflect.MethodAccessorGenerator.generate(MethodAccessorGenerator.java:377)
	at
sun.reflect.MethodAccessorGenerator.generateSerializationConstructor(MethodAccessorGenerator.java:95)
	at
sun.reflect.ReflectionFactory.newConstructorForSerialization(ReflectionFactory.java:301)
	at
java.io.ObjectStreamClass.getSerializableConstructor(ObjectStreamClass.java:1177)
	at java.io.ObjectStreamClass.access$1100(ObjectStreamClass.java:45)
	at java.io.ObjectStreamClass$3.run(ObjectStreamClass.java:343)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:329)
	at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:249)
	at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:449)
	at
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1521)
	at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1435)
	at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1626)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
	at java.util.Hashtable.readObject(Hashtable.java:837)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:324)
	at
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:824)
	at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1746)
	at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
	at mucode.Group.<init>(source/mucode/Group.java:220)
	at mucode.MuServer.run(source/mucode/MuServer.java:488)

Log from CopyThread (before pressing Ctrl-C):
szachari@mousakas:~/dload/mucode/examples/CopyThread$ export
CLASSPATH=/usr/java/j2sdk1.4.1_01/jre/lib/rt.jar:/home/szachari/dload/mucode/jar/mucode.jar:.
szachari@mousakas:~/dload/mucode/examples/CopyThread$ java Cloner
localhost:2000 
Cloner active, i = 0
About to clone the Cloner...
Cloner active, i = 1
Cloner active, i = 2
Cloner active, i = 3
Cloner active, i = 4
Cloner active, i = 5
Done.
Cloner active, i = 6
Cloner active, i = 7
Cloner active, i = 8
Cloner active, i = 9
Cloner active, i = 10
Cloner active, i = 11
Cloner active, i = 12
Cloner active, i = 13
Cloner active, i = 14
Cloner active, i = 15
Cloner active, i = 16
Cloner active, i = 17
Cloner active, i = 18
Cloner active, i = 19
Cloner active, i = 20
Cloner active, i = 21
Cloner active, i = 22
Cloner active, i = 23
Cloner active, i = 24

-- 
Stefanos Zachariadis
Dept. of Computer Science, University College London
Gower Street, London, WC1E 6BT, United Kingdom 
WWW: http://www.cs.ucl.ac.uk/staff/s.zachariadis
Public Key: On Webpage
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